US swimmer Nathan Adrian holds his gold medal after winning the men's 100m freestyle final swimming event at the London 2012 Olympic Games on August 1, 2012 in London.

Nathan Adrian of the U.S. celebrates winning the men's 100m freestyle final during the London 2012 Olympic Games at the Aquatics Centre August 1, 2012. Adrian won the 100 metres freestyle final at the London Olympics on Wednesday to become the first American to win gold in the blue-riband sprint for nearly a quarter of a century.

LONDON, ENGLAND - AUGUST 01: Nathan Adrian of the United States celebrates after he won the Final of the Men's 100m Freestyle on Day 5 of the London 2012 Olympic Games at the Aquatics Centre on August 1, 2012 in London, England.